/Engine/Source/Runtime/Engine/Public/Net/RepLayout.h
This includes:
[TUniquePtr](API\Runtime\Core\Templates\TUniquePtr)< [FRepState](API\Runtime\Engine\Net\FRepState) > CreateRepState ( const FConstRepObjectDataBuffer Source, [TSharedPtr](API\Runtime\Core\Templates\TSharedPtr)< [FRepChangedPropertyTracker](API\Runtime\NetCore\Net\Core\PropertyConditions\FRepChangedPropertyTracker) > & InRepChangedPropertyTracker, ECreateRepStateFlags Flags ) const